Question

which angle is complementary to ∠1?

Explanation:

Step1: Recall the definition of complementary angles

Complementary angles are two angles whose sum is \(90^{\circ}\).

Step2: Analyze the given angles

From the figure, we can see that \(\angle1+\angle3 = 90^{\circ}\) (as the right - angle symbol indicates that the sum of \(\angle1\) and \(\angle3\) is a right angle).

Answer:

\(\angle3\)